Valve.



No. 67:,142. Patented Apr. 2, l90l.

J. 2. MURPHY.

VALV E.

\ (Application filed July 5, 1900.

(No Model.) 2 Sheets-Sheet l.

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' I 9' n, M f w a h n 1 E 5 alk L Patented Apr. 2, I90l.

JOHN Z. MURPHY, OF CHICAGO, ILLINOIS.

VALVE.

SPECIFICATION forming part of Letters Patent No. 671,142, dated April 2,1901.

Application filed July 5, 1900. Serial No. 22,530. (No model.)

T0 at whom it may concern:

Be it known that I, J OHN Z. MURPHY, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Valves, of which the followingis a specification.

My invention relates particularly to the operation of large valves, andmy primary object is to provide a valve of improved construction whichmay be readily operated.

In the accompanying drawings, Figure 1 is a sectional view of myimprovedvalve-casing and attached parts, and Figs. 2, 3, and 4 sections taken asindicated at the corresponding lines of Fig. 1.

In the preferred construction the valvecasing and valve-seat comprisethe globe-sections A A and the interposed section A provided with portsat. These sections are provided with peripheral flanges 17 1/11 where atthey are secured together by bolts 11 There are employed a mainadmission-valve B and an auxiliary or relief valve O,the former beingprovided with main admission-ports c and relief-ports c and the latterwith arms 0 which cover said relief-ports. The valves are journaled torotate on a central stud d, projecting upwardly from the valve-seat.This stud is fixed to the valve-seat and is provided with a head 61',havingon its under surface a circular groove d which registers with acorresponding groove d in the adjacent surface of the valve 0, the twogrooves receiving springs C1 The valve 0 is provided throughout aportion of the periphery of its upper or outer surfacewith a rack orgear-segment f, with which engages a pinionf, fixed on a shaftf disposedparallel to the valves and journaled in the section A of the cas ng.Preferably the section A is provided w' h a stuffing-box g and aperforated boss g, nd the shaft is reduced in size at one enditoreceivethe pinion, whereby a shoulder f is afforded, which confines the pinionagainst a seat or recess on the adjacent inner surface of the section A.An adjustable set-screw g has threaded connection with the internalsurface of the boss 9, and its reduced end bears against the adjacentend of the shaft, whereby the shaft is confined longitudinally. Thevalve 13 is provided at a portion of the periphery of its upper surfacewith a lug h, which is movable in a recess or slot h at the periphery ofthe relief valve. The ends of the recess afford shoulders which areengaged in opening or closing the main valve after the supplementalvalve has been first opened or closed. It will thus be understood thatwhen the shaft f is rotated, as by a suitable hand-wheel or other means,the small area-valve O is first turned to uncover the relief-ports,after which the main valve is opened, and that in the reverse movementthe valve 0 is first closed and then through its medium the main valveis closed. When the relief-valve is opened preparatory to opening themain valve, the eifect is to equalize the pressure upon or balance themain valve. The springs d serve to yieldingly hold the valves to theirseats after the steam-pressure has become equalized.

It will be observed that my construction is such that the top of thevalve-casing section A is left unobstructed, whereby this section, aswell as the section A, can be provided with a pipe-attaching flange andthe steam caused to pass in a straight course through the valve.

As shown, the valve-casing is contractedlat its ingress and egress ends,and the pinion f is removed from the course of the steam, beingsheltered by the overhanging shoulder of the valve-casing.

What I claim as new, and desire to secure by Letters Patent, is-

1. Ina valve, the combination of a casing having an open ingress end, avalve-seat, a main valve provided with main and relief ports and locatedbetween said valve-seat and said ingress end, means on the relief-valvefor engaging the main valve after an initial rotation of therelief-valve, and means, laterally arranged with reference to the casingand engaging the periphery of said relief-valve, through the medium ofwhich the relief-valve is operated, substantially as and for the purposeset forth.

2. In a valve, the combination of a casing, a valve-seat, a main valveprovided with main and relief ports, a relief-valve covering saidrelief-ports, a rack on the periphery of the reliefvalve, a pinionengaging said rack, means for operating said pinion, and means forengagement on said valves, whereby the main valve may be operatedthrough the medium of the relief-valve after an initial movement of therelief-valve, substantially as described.

3. The combination of a valve-casing having end openings in a directline with each other and provided with pipe-attaching end flanges, acircular valve-seat intermediate said ends and provided with ports, acircular main valve provided with main and relief ports, a relief-valvecovering the relief-ports, meanson said valves for engaging each otherafter a partial rotation of the relief-valve and through the medium ofwhich the main valve is operated, and means, laterally arranged withreference to the casing, and engaging the periphery of saidrelief-valve,and through the medium of which said relief-valve is0perated, substantially as and for the purpose set forth.

4. The combination of a valve-casing, a valve-seat A intermediate theends thereof, a main valve, a reliefvalve, a central stud connectingsaid valves to said valve-seat, a

rackfon the relief-valve, a transverse shaft f, a pinion on said shaftand in engagement with said rack, and a lug and recess on said valves,whereby the main valve is operated through the medium of therelief-valve, substantially as described.

5. The combination of valve-casing sections A and A','an interposedsection A provided with ports and affording a valve-seat, a central studsecured to said valve-seat, a main valve and a relief-valve journaled onsaid stud, a head for said stud, a spring confined between said head andsaid relief-valve, means on the relief-valve for engaging and operatingthe main valve, and means for operating the relief-valve, substantiallyas described.

6. The combination of a valve-casing having contracted ingress andegress ends in direct line with each other, a transverse valveseatinterposed between the ends, a. main valve provided with main and reliefports, a relief-valve covering the relief-ports, means on therelief-valve for engaging and moving the main valve, a rack on theperiphery of said reliefvalve, a transverse actuating shaft, and apinion on said shaft and engag ing said rack, said pinion being locatedbeneath the contracted portion .of the adjacent end of the casing andout of the course of the fluid, substantially as and for the purpose setforth.

7. The combination of a valve-casing having contracted ingress andegress ends in direct line With each other, a transverse valveseatinterposed between the ends, a main valve provided with main and reliefports, a relief-valve covering the relief-ports, means on therelief-valve for engaging and moving the main valve, operating means atthe periphery of said relief-valve, and manuallyactuated means engagingsaid peripheral operating means and located beneath the contractedportion of the adjacent end of the easing out of the course of thefluid, substantially as and for the purpose set forth.

JOHN Z MURPHY.

In presence of D. W. LEE, A. 1). BAOOI.

